Ahhhh - fun Bullshit without rancor or major division - I always asked, "You trolling for a friend?" With a glance in the direction indicated (the crotch har har har)!
And as for flies - I believe the correct English would be "Fly's open" indicating a conjunctive ( is that really a word?) of "Fly is open."! And a great April Fools to you all!!!
Steve